How do you determine the correct trim tab size?Guide to Trim Tabs - Bennett Marine all you need to know
There are many factors that affect the choice of properly sized trim tabs, and the ultimate responsibility for selection is up to the boat owner.The recommendations are based on performance.Depending on power, engine configuration, weight distribution, type of boat, and use, your choice may vary.The most efficient trim tabs are the ones that will comfortably fit on the transom.
For every foot of boat length, choose at least one inch of trim tab span.When choosing a general trim tab size, double check the size by measuring the transom.Follow the Vee of the hull when measuring.
Most applications use the 9 chord.In limited Transom Space Boats with twin outboards or twin I/Os, or boats with transom configurations that limit trim tab span, the 12 gauge tabs may be more effective.To fit the maximum span trim tab, use the guidelines above.Extra Lift Slower boats (less than 15 mph), semi-displacement hull, boats over 50 feet, outboards on brackets, or boats with any other feature that increases the need for lift off the ground are all examples.The 12" chord provides more surface area by using more water flow and providing more lift.Installation requirements.
The transom and the bottom of the boat should be followed by trim tabs.Side to side control trim tabs are mounted from the chine and run towards the keel.